Remove Grunt specific paragraph and redirect to CONTRIBUTING.md

README.md

@@ -27,34 +27,9 @@ Amber is released under the MIT license. All contributions made for inclusion ar
 Building Amber
 --------------
 
-Amber uses [Grunt.js](http://gruntjs.com/) as build system since version `0.10.0`.
-
-If you already have Grunt.js v0.3.x installed locally run the following (otherwise ignore these lines):
-
-    cd ${Amber_DIR}
-    npm uninstall grunt
-
-To install Grunt.js v0.4.x on the commandline execute the following commands:
-
-    npm install -g grunt-cli grunt-init
-
-Amber depends on some web libraries to work in browser, using bower to manage these dependencies.
-To install bower, run:
-
-    npm install -g bower
-
-To get all dependencies, run:
-
-    cd ${Amber_DIR}
-    bower install   # dependencies for the web
-    npm install     # dependencies for the cli development
-
-And finally, compile Amber using the following command:
-
-    cd ${Amber_DIR}
-    grunt
-
-For Windows support check the [Grunt.js on Windows](http://gruntjs.com/frequently-asked-questions#does-grunt-work-on-windows) page.
+This step is only used by people developing Amber itself.
+Please refer to [CONTRIBUTING.md](CONTRIBUTING.md) for further details.
+It explains the Amber development setup and how to contribute.
 
 
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